Communication device and integrated circuit

Abstract

Provided is a radio communication base station device which can suppress a use amount of an SRS communication resource. In this device, a correlation rule setting unit ( 102 ) sets a rule for correlating a preamble with an SRS transmission time interval so that the preamble transmission time band and the SRS transmission time band are in the same transmission time band. An SRS transmission band decision unit ( 103 ) decides a time interval of a transmission time band which can transmit the SRS according to the preamble transmission time interval inputted from a preamble transmission band decision unit ( 101 ) and the correlation rule setting unit ( 102 ).

The invention claimed is: 
     
       1. A mobile station apparatus, comprising:
 an arrangement section configured to arrange a second signal transmitted in a guard time for a first signal in a first transmission field that matches a second transmission field for the second signal, wherein the first signal is transmitted from another mobile station apparatus; and 
 a transmitting section configured to transmit the second signal arranged in the guard time. 
 
     
     
       2. The mobile station apparatus according to  claim 1 , wherein the first signal is a random access preamble and the second signal is a sounding reference signal, SRS. 
     
     
       3. The mobile station apparatus according to  claim 2 , wherein the another mobile station apparatus is non-synchronized in an uplink, or wherein the mobile station apparatus is synchronized in the uplink. 
     
     
       4. The mobile station apparatus according to  claim 2  or  3 , further comprising:
 a radio receiving section configured to receive a control signal including a preamble transmission time interval and an SRS transmission time interval, and 
 a detection section configured to detect the SRS transmission time interval, 
 wherein said transmitting section is configured to transmit the sounding reference signal based on the SRS transmission time interval. 
 
     
     
       5. The mobile station apparatus according to  claim 2  or  3 , wherein the guard time is a non-transmission period after the random access preamble. 
     
     
       6. The mobile station apparatus according to  claim 2  or  3 , wherein the guard time prevents the random access preamble from delaying and causing interference with a next signal of a next transmission field. 
     
     
       7. The mobile station apparatus according to one of  claims 1  to  3 , wherein the arrangement section is configured to arrange the second signal in the guard time such that a time interval between the first signal and the second signal becomes maximum. 
     
     
       8. The mobile station apparatus according to one of  claims 1  to  3 , wherein the arrangement section is configured to arrange the second signal in a last long block of the first transmission field, and wherein the first transmission field includes 14 long blocks. 
     
     
       9. The mobile station apparatus according to one of  claims 1  to  3 , wherein the first transmission field is a subframe of 1 ms or comprising 14 long blocks. 
     
     
       10. The mobile station apparatus according to one of  claims 1  to  3 , wherein the second signal is transmitted periodically, or wherein the first signal is transmitted periodically. 
     
     
       11. The mobile station apparatus of one of  claims 1  to  3 ,
 wherein the mobile station apparatus is part of a system including a base station apparatus comprising:
 a receiving section configured to receive the first signal which is provided with the guard time and the second signal; 
 a setting section configured to set up an association between the first signal and the second signal such that the first transmission field for the first signal matches the second transmission field for the second signal; and 
 a determining section configured to determine the second transmission field based on the first transmission field and the association. 
 
 
     
     
       12. A transmission method carried out in a mobile station apparatus, the method comprising:
 arranging a second signal transmitted in a guard time for a first signal in a first transmission field that matches a second transmission field for the second signal, wherein the first signal is transmitted from another mobile station apparatus; and 
 transmitting the second signal arranged in the guard time. 
 
     
     
       13. A base station apparatus comprising:
 a receiving section configured to receive a first signal which is provided with a guard time and a second signal; 
 a setting section configured to set up an association between the first signal and the second signal such that a first transmission field for the first signal matches a second transmission field for the second signal, wherein the first transmission field is a subframe of 1 ms or comprising 14 long blocks; and 
 a determining section configured to determine the second transmission field based on the first transmission field and the association. 
 
     
     
       14. An association setting method for a base station apparatus that receives a first signal which is provided with a guard time and a second signal, the method comprising:
 setting up an association between the first signal and the second signal such that a first transmission field for the first signal matches a second transmission field for the second signal; and 
 determining the second transmission field based on the first transmission field and the association.